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CVE-2026-116541high8.2

netty-tcnative before 2.0.84.Final Denial of Service via BIO Write Overcount

Impact

Netty netty-tcnative before 2.0.84.Final has a denial of service vulnerability due to incorrect byte count in the BIO write callback. Remote TLS 1.3 peers can cause connection issues or JVM process abortion. The vulnerability is caused by an incorrect calculation.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

netty · VulnCheck

netty-tcnative

1 range
VulnCheck version evidence

Package identity

pkg:maven/io.netty/netty-tcnativeExplore io.netty:netty-tcnative →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 2.0.84.Final

custom versions

unaffected

unknown

Other versions: unaffected

netty · VulnCheck

netty-tcnative-boringssl-static

1 range
VulnCheck version evidence

Package identity

pkg:maven/io.netty/netty-tcnative-boringssl-staticExplore io.netty:netty-tcnative-boringssl-static →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 2.0.84.Final

custom versions

unaffected

unknown

Other versions: unaffected

Original source description

Netty netty-tcnative before 2.0.84.Final contains a denial of service vulnerability in the tcn_write_to_bytebuffer BIO write callback that overreports bytes consumed. Remote TLS 1.3 peers can provoke queued post-handshake records like NewSessionTicket or KeyUpdate to truncate flights, fail connections, or abort the JVM process.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116541

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-682 ↗

Incorrect Calculation

VulnCheck

Related →
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-26
CISA-ADP

Additional data publisher

2026-10-26

What changed

Follow changes
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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

6 sources
github.com/netty/netty-tcnative/security/advisories/GHSA-9xr3-jwv4-r489
vendor-advisoryVulnCheck
github.com/netty/netty-tcnative/commit/e31df4a5885b35085fdfa3e2dca7c1f705d4745b
patchVulnCheck
github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c
technical-descriptionVulnCheck
github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final
release-notesVulnCheck
github.com/netty/netty-tcnative
productVulnCheck
www.vulncheck.com/advisories/netty-tcnative-before-2.0.84-final-denial-of-service-via-bio-write-overcount
third-party-advisoryVulnCheck